Ultrasound Characterization of Postmenopausal Endometriosis

INCLUSION CRITERIA * Postmenopausal status, defined by at least 12 consecutive months of spontaneous amenorrhea not attributable to pregnancy, lactation, medical therapy, or other pathological causes, or, when clinically required, by biochemical evidence consistent with menopause based on a serum FSH level \>25 IU/L. * Attendance at participating gynecological outpatient clinics for routine examination * Ability to undergo transvaginal ultrasound examination * Ability to provide informed consent EXCLUSION CRITERIA * Previous surgical and/or radiological diagnosis of endometriosis * History of hysterectomy and/or bilateral oophorectomy (any surgical approach) * Active pelvic malignancy at the time of enrollment * Inability to undergo or tolerate transvaginal ultrasound examination (e.g., severe introital stenosis, vaginismus, or never sexually active) * Non-interpretable ultrasound examination due to technical limitations